Re: split horizon

CE (HUB)
G0/1
|
OSPF
|
PE1
|
MPLS CLOUD-----------------------------PE2------OSPF-CE(SPOKE1) (
2.2.2.0/24)

|
|
|
PE3
|
OSPF
|
CE(SPOKE2) (1.1.1.0/24)

IN VRF of customer -

PE3 advertises 1.1.1.0/24 routes with RT1:1 and imports 2:2

PE2 advertises 2.2.2.0/24 routes with RT 1:1 and imports 2:2

PE1 exports routes with RT 2:2 and imports 1:1

NOW 1.1.1.0/24 is learnt on CE HUB Gi0/1 via OSPF .....
Will CE HUB advertise 1.1.1.0/24 on Gi0/1 back as it is required for CE
SPOKE1 for SPOKE to SPOKE reachabilty via HUB?

On Tue, Jan 5, 2010 at 11:57 PM, <Charles.Henson_at_regions.com> wrote:

> Hey Jack,
> How about a little more details? Configs? Shows? Anything? Marko is
> correct.
>
> Charles Henson
>
>
>
>
>
> |------------>
> | From: |
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> >--------------------------------------------------------------------------------------------------------------------------------------------------|
> |jack daniels <jckdaniels12_at_gmail.com>
> |
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> >--------------------------------------------------------------------------------------------------------------------------------------------------|
> |------------>
> | To: |
> |------------>
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> >--------------------------------------------------------------------------------------------------------------------------------------------------|
> |Marko Milivojevic <markom_at_ipexpert.com>
> |
>
> >--------------------------------------------------------------------------------------------------------------------------------------------------|
> |------------>
> | Cc: |
> |------------>
>
> >--------------------------------------------------------------------------------------------------------------------------------------------------|
> |Cisco certification <ccielab_at_groupstudy.com>
> |
>
> >--------------------------------------------------------------------------------------------------------------------------------------------------|
> |------------>
> | Date: |
> |------------>
>
> >--------------------------------------------------------------------------------------------------------------------------------------------------|
> |01/05/2010 12:21 PM
> |
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> >--------------------------------------------------------------------------------------------------------------------------------------------------|
> |------------>
> | Subject: |
> |------------>
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> >--------------------------------------------------------------------------------------------------------------------------------------------------|
> |Re: split horizon
> |
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> >--------------------------------------------------------------------------------------------------------------------------------------------------|
>
>
>
>
>
> I understand that but ,u mean in OSPF
>
> IF i recive 1.1.1.0/24 on G0/1 of HUB
>
> I'LL advertise 1.1.1.0/24 on Gi0/1 (SAME INTERFACE) of HUB
>
>
>
>
> On Tue, Jan 5, 2010 at 11:44 PM, Marko Milivojevic
> <markom_at_ipexpert.com>wrote:
>
> > On Tue, Jan 5, 2010 at 19:00, jack daniels <jckdaniels12_at_gmail.com>
> > wrote:
> > > Hi guys,
> > >
> > > I have a scenario where in MPLS VPN - HUB and SPOKE.
> > >
> > > CE-PE protocol is OSPF everywhere
> > >
> > >
> > > HUB is recieving routes from one SPOKE on int G0/1 and not advertiseing
> > on
> > > same (SPLIT horizon).
> > >
> > > In ospf how can we overcome such issue.
> >
> > OSPF is a link state protocol. It doesn't use split horizon (at least
> > not within the same area and even in multiarea, the behavior is not
> > called that). You are probably having some other issue...
> >
> > --
> > Marko Milivojevic - CCIE #18427
> > Senior Technical Instructor - IPexpert
> >
> > Mailto: markom_at_ipexpert.com
> > Telephone: +1.810.326.1444
> > Fax: +1.810.454.0130
> > Community: http://www.ipexpert.com/communities
>
>
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Received on Wed Jan 06 2010 - 00:06:14 ART